Rear Panel Connections; Rack Mounting; Spot Checks - 3Com SuperStack 4 3C16465B User Manual

Display Function Switch
3
This switch affects the Status LEDs described in 4 and 5.
Out This is the normal position of the switch.
The Status LEDs show the Activity and Link Status of
each port.
In When the switch is pressed in, the Status LEDs show
the Duplex and Speed Status of each port. The switch
returns to the out position when released.
Activity/Duplex Status LEDs
4
The first (top) and third row of LEDs, which are colored yellow,
show the activity or duplex status of the related ports:
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When the Display Function switch is out (its normal position),
these LEDs show the activity of each port. The LED flashes
when packets are received or transmitted on the port.
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When the Display Function switch is pressed in, these LEDs
show the duplex status of each port:
On The port is operating in full duplex mode.
Off
Ports 1 to 24: If the link is established, the port is operating in
half duplex mode.
Link/Speed Status LEDs
5
The second and fourth (bottom) row of Status LEDs, which are
colored green, show the link or speed status of the related ports:
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When the Display Function switch is out (its normal position),
these LEDs show the link status of each port:
On The link has been established and the segment attached to the
port is functional.
Off The link has not been established. Either nothing is connected
to the port, or there is a problem:
Check that the attached device is powered on.
Check that the cable is the correct type and is not faulty.
If the LED is off for port 12 (3C16464B) or 24 (3C16465B),
check the setting of the MDI switch. Refer to 2. Try toggling the
MDI switch.
If the port is connected to another unit's MDI/MDIX port, check
the other unit's MDI switch position.
If these checks do not identify the cause of a problem, it may
be that the unit or the device connected to the port is faulty.
Contact your supplier for further advice.
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When the Display Function switch is pressed in, these LEDs
show the speed status of each port:
On The link is operating at 100Mbps.
Off If the link is present, it is operating at 10Mbps.
Power/Self Test LED
6
The Power/Self test LED shows a number of conditions:
Green The unit is powered on and ready for use.
Flashing The unit is performing its power up procedure. If the LED is still
flashing green 1 minute after power up, there is a fault. Con-
green
tact your supplier.
Yellow The unit has failed. Power off the unit, wait five seconds and
power on the unit. Contact your supplier if the LED continues
to light yellow.
Off
The unit is not receiving power:
Check the power cord is connected correctly.
If the unit still does not operate, contact your supplier.

Rear Panel Connections

Power Supply
7
The Baseline 10/100 Switch automatically adjusts to the supply
voltage. Only use the power cord that is supplied with the
Baseline 10/100 Switch.
Socket for Redundant Power System (RPS)
8
Only connect a 3Com SuperStack 3 Advanced RPS (3C16070,
3C16071, 3C16071A or 3C16071B) to this socket. An
appropriate power module and cable is required. The connector
on the Baseline 10/100 Switch is a Type 2 socket. For details,
follow the installation instructions in the guides that accompany
the Advanced RPS and the power module.
CAUTION: When connecting an RPS power module cable
to the unit, take off the protective cover by removing the
fixings with a suitable tool. Keep the cover and the fix-
ings in a safe place. If you remove the RPS power module
cable at any time, you must replace the protective cover.
Self-adhesive Pads
9
The unit is supplied with four self-adhesive rubber pads.
You do not need to apply the pads if you intend to rack
mount the unit.
If the unit is to be part of a free standing stack, apply the pads to
each marked corner area on the underside of the unit. Place the unit
on top of the lower unit, ensuring that the pads locate with the
recesses of the lower unit.
Positioning the Baseline 10/100 Switch
CAUTION: If installing the Baseline 10/100 Switch in a
stack of different size SuperStack 3 units, the smaller
!
units must be installed above the larger ones. Do not
have a free standing stack of more than six units.
When deciding where to position the Baseline 10/100 Switch
ensure:
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It is accessible and cables can be connected easily.
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Cabling is away from sources of electrical noise such as
radios, transmitters and broadband amplifiers, and away from
power lines and fluorescent lighting fixtures.
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Water or moisture cannot enter the case of the unit.
T
Air flow around the unit and through the vents in the side of
the case is not restricted (3Com recommend that you provide
a minimum of 25mm (1in.) clearance).
To prolong the operational life of your units:
T
Never stack units more than six high if free standing, and
ensure that cables are supported so that they do not cause
the stack to fall over.
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Do not place objects on top of any unit or stack.
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Do not obstruct any vents at the sides of the case.

Rack Mounting

The Baseline 10/100 Switch can be mounted in a 19-inch equip-
ment rack using the Mounting Kit. Refer to "Mounting Kit
Instructions" on page 5.
Power Up
Use the following sequence to power up the Baseline 10/100
Switch :
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Check the network connections and cables.
T
Connect the power supply cable to the appropriate power
socket on the rear panel of the unit; refer to 7 or 8.
T
Connect the plug to the power supply outlet socket and
switch on the power supply at the socket. If you are using
the Advanced Redundant Power System, ensure it is pow-
ered on.
When the switch is powered on, the Power/Self Test LED should
first flash green, then stay lit. If it does not, refer to 6.

Spot Checks

At frequent intervals you should visually check the Baseline
10/100 Switch. Regular checks can give you an early warning of a
possible failure; any problems can then be attended to when
there will be least effect on users. Check the following:
Cabling Check that all external cabling connections are secure
and that no cables are pulled taut.
Cooling fans Where possible, check that the cooling fans are operat-
ing by listening to the unit. The fans are fitted near to
the front right hand side of the unit (when viewed from
the front).
If you experience any problems operating the Baseline 10/100 Switch,
refer to "Problem Solving" on page 5.
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